Atomic Structure
The center of the atom, discovered by the cathode ray tube
What is the atomic number for oxygen
8
Why do elements decay
Because they are unstable
The specific term for the time it takes for half of a radioactive sample to decay
What is a half life
Contains protons and neutrons
What subatomic particles are found in the nucleus?
The atomic number is the same as
The number of protons
What causes an isotope
radioactive decay, changing the mass.
If a substance has a half-life of 10 years, the fraction of the original sample that will remain after 20 years
1/4, a quarter
This subatomic particle has a neutral charge
What is the charge of a neutron?
The mass number is
the neutrons and protons of the element
What particle is heavy and the same structure as a Helium nucleus.
Alpha particle
If a sample of a radioisotope weighing 80 grams is reduced to 10 grams after 60 minutes, the length of its half-life
20 minutes
The smallest unit of matter
What is an atom?
How many neutrons in Zirconium-92
52
Gamma is energy
An artifact is found to contain only 12.5% of its original Carbon-14. Given C-14 has a half-life of 5,730 years, this is the age of the artifact
17,190 years
Where are electrons found in the atom?
What makes an element electrically neutral
When the protons and electrons are the same
The process that changes the identity of an atom by altering its number of protons in the nucleus
What is transmutation
In a sample, you find 93.75% daughter isotope and 6.25% parent isotope. If the parent isotope's half-life is 10 million years, this is the age of the sample.
What is 40 million years?